Move command summary to right below features notes
Have a template for each feature
Adding a person: add
Adds a person to the address book.
Format:
`add n/NAME p/PHONE_NUMBER e/EMAIL a/ADDRESS t/SCHEDULE s/SUBJECT f/FEE [paid/PAID_AMOUNT] [owed/OWED_AMOUNT]`
Examples:
`
add n/John Doe p/98765432 e/johnd@example.com a/21 Kent Ridge Rd, S119077 t/Sunday-1000-1200 s/GP f/100 paid/100 owed/0
`
`
add n/Betsy Crowe s/Math t/Saturday-1400-1600 e/betsy@mail.com a/Block 7 #02-02 Red Hill p/1234567 f/200 owed/200
`
**Constraints:**
1. SCHEDULE must be in the format of `DAY_OF_THE_WEEK`-`START_TIME`-`END_TIME`
2. DAY_OF_THE_WEEK includes Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday.
3. START_TIME and END_TIME are represented as `HHmm`.
4. SUBJECT should only be:
`economics` / `literature` / `music` / `biology` / `chemistry` / `science` / `english` / `chinese` / `malay` / `tamil` / `math` / `history` / `geography` / `physics` / `GP`
5. FEE, PAID_AMOUNT and OWED_AMOUNT must be at least 0 with at most 2 decimal places.
Example: `12.00`, `0.0` or `7`
**Tips**
1. New clashing schedule will be informed so that you can modify using the [`edit` command](#editing-a-person--edit)
2. RATE is the tuition rate (per hour).
Adding a person:
add