[#214] Fix alignment by changing index font

[baskargopinath]

Fixes #214

Explanation below image

• Issue: Alignment problem with index numbers in PersonListCard due to proportional font.
• Solution: Changed the index font to Arial Mono, a monospaced font.
• Font Load: Added Arial Mono MT Pro Regular font to the project.
• CSS Update: Modified cell_big_index style to use Arial Mono.
• FXML Adjustment: Updated HBox and Label elements for consistent alignment.
• Outcome: Achieved uniform alignment of index numbers, improving the UI appearance.

[canihasreview[bot]]

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[canihasreview[bot]]

v1

@baskargopinath submitted v1 for review.

• [v1 1/1] Fix alignment by changing index font

(:books: Archive)

Checkout this PR version locally

```sh git fetch https://github.com/se-edu/addressbook-level3.git refs/pr/215/1/head:BRANCHNAME ``` where `BRANCHNAME` is the name of the local branch you wish to fetch this PR to.

[canihasreview[bot]]

v2

@baskargopinath submitted v2 for review.

• [v2 1/2] Fix alignment by changing index font
• [v2 2/2] Remove unused fonts

(:books: Archive) (:chart_with_upwards_trend: Interdiff between v1 and v2) (:chart_with_upwards_trend: Range-Diff between v1 and v2)

Checkout this PR version locally

```sh git fetch https://github.com/se-edu/addressbook-level3.git refs/pr/215/2/head:BRANCHNAME ``` where `BRANCHNAME` is the name of the local branch you wish to fetch this PR to.

[damithc]

@baskargopinath If the second commit is simply fixing an error introduced by the first commit, the proper fix is to revise the first commit to not introduce the error at all. That way, we avoid polluting the history with unnecessary commits.

[baskargopinath]

Understood prof will fix it asap @damithc

[canihasreview[bot]]

v3

@baskargopinath submitted v3 for review.

• [v3 1/1] Fix alignment by changing index font

(:books: Archive) (:chart_with_upwards_trend: Interdiff between v2 and v3) (:chart_with_upwards_trend: Range-Diff between v2 and v3)

Checkout this PR version locally

```sh git fetch https://github.com/se-edu/addressbook-level3.git refs/pr/215/3/head:BRANCHNAME ``` where `BRANCHNAME` is the name of the local branch you wish to fetch this PR to.

[damithc]

@baskargopinath two other comments:

1. It's good enough for the commit message subject to state the WHAT part (no need for the HOW) e.g., Fix misalignment of person names. The HOW part can be in the body.
2. The max commit message body width is 72 chars. Looks like yours is unnecessarily narrower than that.

[baskargopinath]

@damithc okay ived fixed it prof. I had to delete this repo so i can fork AB3-J17 for 2103R. I have sent the PR from my nus github account instead with the requested changes