refactor: rename manager codebase dir new-api → heicode, module github.com/heicode/manager

Remove user-facing new-api naming; Docker/network/container names use heicode.
Go imports updated; Dockerfiles and workflows ldflags fixed.

Made-with: Cursor

heicode/.gitattributes

@@ -0,0 +1,42 @@
+# Auto detect text files and perform LF normalization
+* text=auto
+
+# Go files
+*.go text eol=lf
+
+# Config files
+*.json text eol=lf
+*.yaml text eol=lf
+*.yml text eol=lf
+*.toml text eol=lf
+*.md text eol=lf
+
+# JavaScript/TypeScript files
+*.js text eol=lf
+*.jsx text eol=lf
+*.ts text eol=lf
+*.tsx text eol=lf
+*.html text eol=lf
+*.css text eol=lf
+
+# Shell scripts
+*.sh text eol=lf
+
+# Binary files
+*.png binary
+*.jpg binary
+*.jpeg binary
+*.gif binary
+*.ico binary
+*.woff binary
+*.woff2 binary
+
+# ============================================
+# GitHub Linguist - Language Detection
+# ============================================
+electron/** linguist-vendored
+web/** linguist-vendored
+
+# Un-vendor core frontend source to keep JavaScript visible in language stats
+web/src/components/** linguist-vendored=false
+web/src/pages/** linguist-vendored=false