fix(theme): replace cross-package relative style imports with package-name imports

Change all relative path imports (`../abc/`, `../chart/`, `../../../form/`)
to package-name imports (`@delon/abc/`, `@delon/form/`) to fix pnpm strict
module resolution.

- Remove `@import '../chart/index.less'` from default.less/variable.less
  (chart is not a declared dependency of theme)
- Add `@import './theme-default.less'` to abc/index.less for self-contained styles
- Add `dist/` to generate-css.js paths (ordered before node_modules/) to
  resolve package-name imports during build
- All 8 theme CSS files compile successfully with zero errors

Close ng-alain/ng-alain#2631

Co-Authored-By: Claude <noreply@anthropic.com>

Author: cipchk

packages/abc/index.less

@@ -1,3 +1,4 @@
+@import './theme-default.less';
 @import './st/style/index.less';
 @import './sv/style/index.less';
 @import './se/style/index.less';

packages/theme/default.less

@@ -2,5 +2,4 @@
 @import './system/index.less';
 @import './layout-default/style/index.less';
 @import './layout-blank/style/index.less';
-@import '../abc/index.less';
-@import '../chart/index.less';
+@import '@delon/abc/index.less';

packages/theme/system/delon/index.less

@@ -1,5 +1,5 @@
-@import '../../../form/src/style/index.less';
-@import '../../../acl/src/style/index.less';
+@import '@delon/form/src/style/index.less';
+@import '@delon/acl/src/style/index.less';
 @import '../../setting-drawer/style/index.less';
 @import '../../theme-btn/style/index.less';
 @import '../../src/pipes/yn/style/index.less';

packages/theme/theme-compact.less

@@ -3,4 +3,4 @@
 @import './system/theme-compact.less';
 @import './layout-default/style/theme-compact.less';
 @import './layout-blank/style/theme-compact.less';
-@import '../abc/theme-compact.less';
+@import '@delon/abc/theme-compact.less';

packages/theme/theme-dark.less

@@ -3,4 +3,4 @@
 @import './system/theme-dark.less';
 @import './layout-default/style/theme-dark.less';
 @import './layout-blank/style/theme-dark.less';
-@import '../abc/theme-dark.less';
+@import '@delon/abc/theme-dark.less';

packages/theme/theme-default.less

@@ -3,4 +3,4 @@
 @import './system/theme-default.less';
 @import './layout-default/style/theme-default.less';
 @import './layout-blank/style/theme-default.less';
-@import '../abc/theme-default.less';
+@import '@delon/abc/theme-default.less';

packages/theme/theme-variable.less

@@ -3,4 +3,4 @@
 @import './system/theme-variable.less';
 @import './layout-default/style/theme-variable.less';
 @import './layout-blank/style/theme-variable.less';
-@import '../abc/theme-variable.less';
+@import '@delon/abc/theme-variable.less';

packages/theme/variable.less

@@ -2,5 +2,4 @@
 @import './system/index.less';
 @import './layout-default/style/index.less';
 @import './layout-blank/style/index.less';
-@import '../abc/index.less';
-@import '../chart/index.less';
+@import '@delon/abc/index.less';

scripts/build/generate-css.js

@@ -21,7 +21,10 @@ async function genCss(name, min) {
   less.render
     .call(less, content, {
       plugins,
-      paths: [path.join(__dirname, '../../node_modules/')]
+      paths: [
+        path.join(__dirname, '../../dist/'),
+        path.join(__dirname, '../../node_modules/')
+      ]
     })
     .then(({ css }) => {
       const savePath = path.join(ROOT_DIR, `theme/${name}${min ? '.min' : ''}.css`);