Change the regex used to identify module ids in Ballerina Shell

[kdsuneraavinash]

Purpose

Fixes #29366

Approach

Change the regex to identify module ids with alphanumeric characters

Samples

Provide high-level details about the samples related to this feature.

Remarks

List any other known issues, related PRs, TODO items, or any other notes related to the PR.

Check List

• Read the Contributing Guide
• Updated Change Log
• Checked Tooling Support (#)
• Added necessary tests
  • Unit Tests
  • Spec Conformance Tests
  • Integration Tests
  • Ballerina By Example Tests
• Increased Test Coverage
• Added necessary documentation
  • API documentation
  • Module documentation in Module.md files
  • Ballerina By Examples

[codecov]

Codecov Report

Merging #29644 (853fad8) into master (30c21cd) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master   #29644      +/-   ##
============================================
- Coverage     68.08%   68.08%   -0.01%     
+ Complexity    35267    35265       -2     
============================================
  Files          2816     2816              
  Lines        152569   152570       +1     
  Branches      18531    18531              
============================================
- Hits         103883   103873      -10     
- Misses        42527    42537      +10     
- Partials       6159     6160       +1     

Impacted Files	Coverage Δ	Complexity Δ
...lerina/shell/invoker/classload/ImportsManager.java	90.47% <100.00%> (+0.11%)	19.00 <0.00> (ø)
...runtime/internal/scheduling/WorkerDataChannel.java	84.71% <0.00%> (-6.37%)	34.00% <0.00%> (-1.00%)
.../ballerina/runtime/internal/scheduling/Strand.java	78.33% <0.00%> (-1.12%)	43.00% <0.00%> (-1.00%)
...ang/compiler/semantics/model/types/BUnionType.java	71.11% <0.00%> (-1.12%)	63.00% <0.00%> (-2.00%)
.../compiler/bir/codegen/interop/JMethodResolver.java	78.04% <0.00%> (+0.27%)	184.00% <0.00%> (+1.00%)
...n/java/io/ballerina/projects/bala/BalaProject.java	76.47% <0.00%> (+11.76%)	5.00% <0.00%> (+1.00%)

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