chore: more chores for opensourcing (#12)

* adds cargo deny

* adds issue templates

* adds check pr title

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Use this template for reporting issues
+title: ''
+labels: bug
+assignees: ''
+---
+
+### 🐛 Bug Report
+
+#### 📝 Description
+
+Provide a clear and concise description of the bug.
+
+#### 🔄 Reproduction Steps
+
+Steps to reproduce the behaviour
+
+#### 🤔 Expected Behavior
+
+Describe what you expected to happen.
+
+#### 😯 Current Behavior
+
+Describe what actually happened.
+
+#### 🖥️ Environment
+
+Any relevant environment details.
+
+#### 📋 Additional Context
+
+Add any other context about the problem here. If applicable, add screenshots to help explain.
+
+#### 📎 Log Output
+
+```
+Paste any relevant log output here.
+```

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Use this template for requesting features
+title: ''
+labels: feat
+assignees: ''
+---
+
+### 🌟 Feature Request
+
+#### 📝 Description
+
+Provide a clear and concise description of the feature you'd like to see.
+
+#### 🤔 Rationale
+
+Explain why this feature is important and how it benefits the project.
+
+#### 📋 Additional Context
+
+Add any other context or information about the feature request here.

.github/workflows/cargo-deny.yml

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+name: Cargo Deny
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  merge_group:
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  cargo_deny:
+    runs-on: [matterlabs-ci-runner]
+    strategy:
+      matrix:
+        checks:
+          - advisories
+          - bans licenses sources
+
+    # Prevent sudden announcement of a new advisory from failing ci:
+    continue-on-error: ${{ matrix.checks == 'advisories' }}
+
+    steps:
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
+      - uses: EmbarkStudios/cargo-deny-action@v1
+        with:
+          command: check ${{ matrix.checks }}

.github/workflows/check-pr-title.yml

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+name: Check PR title
+
+on:
+  pull_request_target:
+    types:
+      - opened
+      - reopened
+      - edited
+      - synchronize
+  merge_group:
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    permissions:
+      statuses: write
+    steps:
+      - uses: aslafy-z/conventional-pr-title-action@v3
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

deny.toml

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+targets = []
+all-features = false
+no-default-features = false
+feature-depth = 1
+
+[advisories]
+db-path = "~/.cargo/advisory-db"
+db-urls = ["https://github.com/rustsec/advisory-db"]
+vulnerability = "deny"
+unmaintained = "warn"
+yanked = "warn"
+notice = "warn"
+ignore = [
+    "RUSTSEC-2023-0052"
+]
+
+[licenses]
+unlicensed = "deny"
+copyleft = "deny"
+allow = [
+    "MIT",
+    "Apache-2.0",
+    "ISC",
+    "Unlicense",
+    "MPL-2.0",
+    "Unicode-DFS-2016",
+    "CC0-1.0",
+    "BSD-2-Clause",
+    "BSD-3-Clause",
+    "OpenSSL",
+]
+deny = []
+allow-osi-fsf-free = "neither"
+default = "deny"
+confidence-threshold = 0.8
+exceptions = []
+
+[[licenses.clarify]]
+name = "ring"
+version = "*"
+expression = "MIT AND ISC AND OpenSSL"
+license-files = [
+    { path = "LICENSE", hash = 0xbd0eed23 }
+]
+
+[licenses.private]
+ignore = false
+registries = []
+
+[bans]
+multiple-versions = "warn"
+wildcards = "allow"
+highlight = "all"
+workspace-default-features = "allow"
+external-default-features = "allow"
+allow = []
+deny = []
+skip = []
+skip-tree = []
+
+[sources]
+unknown-registry = "warn"
+unknown-git = "warn"
+allow-registry = ["https://github.com/rust-lang/crates.io-index"]
+allow-git = []
+
+[sources.allow-org]
+github = [""]
+gitlab = [""]
+bitbucket = [""]