Issue #432: Migrate linting and formatting to Biome (#452)

* chore(tooling): migrate npm tooling scripts to biome

* chore(biome): add biome configuration

* ci: switch lint workflow to biome

* docs: update contribution and readme for biome

* chore(lint): remove legacy eslint config files

* docs: update lint tooling wording to biome

* fix(lint): address Copilot review feedback

Author: Priyanshubhartistm

.eslintignore

@@ -40,7 +40,7 @@ jobs:
           cache: npm
       - name: Install package dependencies
         run: npm ci
-      - name: Run ESLint
+      - name: Run Biome
         run: npm run lint
       - name: Run Knip
         run: npm run knip
@@ -56,7 +56,7 @@ jobs:
           cache: npm
       - name: Install package dependencies
         run: npm ci
-      - name: Run ESLint
+      - name: Run build check
         run: npm run build:check
   test-units-and-cover:
     name: Unit Tests And Coverage

.eslintrc.js

@@ -14,7 +14,7 @@ Run dead code and dependency analysis before opening a pull request:
 npm run knip
 ```
 
-`npm run lint` now runs Knip first, then ESLint.
+`npm run lint` now runs Biome.
 
 ## Pull Request Process
 
@@ -24,3 +24,12 @@ npm run knip
    Pull Request would represent. The versioning scheme we use is [SemVer](http://semver.org/).
 3. You may merge the Pull Request in once you have the sign-off of two other developers, or if you
    do not have permission to do that, you may request the second reviewer to merge it for you.
+
+## Code Quality
+
+Run Biome checks before opening a pull request:
+
+```
+npm run lint
+npm run format:check
+```

.github/workflows/checks.yml

@@ -470,6 +470,17 @@ Start:
 
 ## Tests
 
+### Linting and formatting (Biome)
+
+Run code quality checks with Biome:
+
+  ```
+  npm run lint
+  npm run lint:fix
+  npm run format
+  npm run format:check
+  ```
+
 ### Unit tests
 
 Open a terminal and change to the project's directory:

CONTRIBUTING.md

@@ -0,0 +1,37 @@
+{
+	"$schema": "https://biomejs.dev/schemas/2.4.11/schema.json",
+	"vcs": { "enabled": true, "clientKind": "git", "useIgnoreFile": true },
+	"files": {
+		"ignoreUnknown": false,
+		"includes": [
+			"**",
+			"!**/node_modules/**",
+			"!**/dist/**",
+			"!**/.test-reports/**",
+			"!**/.coverage/**",
+			"!**/.nostr/**",
+			"!**/tslint.json"
+		]
+	},
+	"formatter": {
+		"enabled": true,
+		"indentStyle": "space",
+		"lineWidth": 120
+	},
+	"linter": {
+		"enabled": true,
+		"rules": {
+			"recommended": false,
+			"correctness": { "noUnusedVariables": "error" },
+			"style": { "useBlockStatements": "warn" },
+			"suspicious": { "noExplicitAny": "off" }
+		}
+	},
+	"javascript": {
+		"formatter": {
+			"quoteStyle": "single",
+			"semicolons": "asNeeded",
+			"trailingCommas": "all"
+		}
+	}
+}