chore(process): add zero-warnings policy to pr-push and pr-review

- pr-push step 1b: lint check before pushing (gdlint, clippy, ruff)
- pr-review step 0c: check warning count before spawning reviewers
- Added .gdlintrc with max-line-length: 120
- Created ticket #783 for Sprint 31: clean up existing 253 warnings
- Updated #780 with edge visibility rule (show edges only for selected system)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gdlintrc

@@ -0,0 +1,47 @@
+class-definitions-order:
+- tools
+- classnames
+- extends
+- docstrings
+- signals
+- enums
+- consts
+- staticvars
+- exports
+- pubvars
+- prvvars
+- onreadypubvars
+- onreadyprvvars
+- others
+class-load-variable-name: (([A-Z][a-z0-9]*)+|_?[a-z][a-z0-9]*(_[a-z0-9]+)*)
+class-name: ([A-Z][a-z0-9]*)+
+class-variable-name: _?[a-z][a-z0-9]*(_[a-z0-9]+)*
+comparison-with-itself: null
+constant-name: _?[A-Z][A-Z0-9]*(_[A-Z0-9]+)*
+disable: []
+duplicated-load: null
+enum-element-name: '[A-Z][A-Z0-9]*(_[A-Z0-9]+)*'
+enum-name: ([A-Z][a-z0-9]*)+
+excluded_directories: !!set
+  .git: null
+expression-not-assigned: null
+function-argument-name: _?[a-z][a-z0-9]*(_[a-z0-9]+)*
+function-arguments-number: 10
+function-name: (_on_([A-Z][a-z0-9]*)+(_[a-z0-9]+)*|_?[a-z][a-z0-9]*(_[a-z0-9]+)*)
+function-preload-variable-name: ([A-Z][a-z0-9]*)+
+function-variable-name: '[a-z][a-z0-9]*(_[a-z0-9]+)*'
+load-constant-name: (([A-Z][a-z0-9]*)+|_?[A-Z][A-Z0-9]*(_[A-Z0-9]+)*)
+loop-variable-name: _?[a-z][a-z0-9]*(_[a-z0-9]+)*
+max-file-lines: 1000
+max-line-length: 120
+max-public-methods: 20
+max-returns: 6
+mixed-tabs-and-spaces: null
+no-elif-return: null
+no-else-return: null
+signal-name: '[a-z][a-z0-9]*(_[a-z0-9]+)*'
+sub-class-name: _?([A-Z][a-z0-9]*)+
+tab-characters: 1
+trailing-whitespace: null
+unnecessary-pass: null
+unused-argument: null