fix: Tapping clear search doesn't clear it

[Adaendra]

📖 Description

Clear the search input and result list in the glossary, when the clear button is tapped.

⁉️ Related Issues

closes: #121

🧪 How to test the change?

1. Open the glossary search bar
2. Do a search - It should display only the resources matching with your search
3. Clear the search by clicking on the "X" button of the search bar - The input is cleared and the list is updated

☑️ Checklist before requesting a review

• [x] I have performed a self-review of my code.
• [x] I have added/updated tests.
• [x] Make sure to add either one of the following labels: version: Major,version: Minor or version: Patch.

[github-actions[bot]]

Bump version from 0.15.0+1 to 0.16.0+1

[github-actions[bot]]

Coverage after merging issue_121 into main will be

48.29%

Coverage Report for Changed Files

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
lib/src/glossary/widgets
search_bar.dart	97.64%	100%	100%	97.64%	131, 168, 172

[github-actions[bot]]

Bump version from 0.16.0+1 to 0.17.0+1

[github-actions[bot]]

Coverage after merging issue_121 into main will be

48.07%

Coverage Report for Changed Files

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
lib/src/glossary/widgets
search_bar.dart	90.14%	100%	100%	90.14%	157, 161–166, 168, 174, 176–177, 217, 221–222

[github-actions[bot]]

Bump version from 0.16.0+1 to 0.17.0+1

[github-actions[bot]]

Coverage after merging issue_121 into main will be

48.07%

Coverage Report for Changed Files

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
lib/src/glossary/widgets
search_bar.dart	90.14%	100%	100%	90.14%	157, 161–166, 168, 174, 176–177, 217, 221–222

[github-actions[bot]]

Bump version from 0.16.0+1 to 0.17.0+1

[github-actions[bot]]

Coverage after merging issue_121 into main will be

48.07%

Coverage Report for Changed Files

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
lib/src/glossary/widgets
search_bar.dart	90.14%	100%	100%	90.14%	157, 161–166, 168, 174, 176–177, 217, 221–222

[github-actions[bot]]

Coverage after merging issue_121 into main will be

48.07%

Coverage Report for Changed Files

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
lib/src/glossary/widgets
search_bar.dart	90.14%	100%	100%	90.14%	157, 161–166, 168, 174, 176–177, 217, 221–222

[github-actions[bot]]

Bump version from 0.17.0+1 to 0.18.0+1

[github-actions[bot]]

Coverage after merging issue_121 into main will be

47.56%

Coverage Report for Changed Files

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
lib/src/glossary/widgets
search_bar.dart	84.42%	100%	100%	84.42%	169, 173–178, 180, 186, 188–189, 196–200, 202, 208, 210–211, 251–252, 257–258