docs(README.md): add new routes (#107)

Author: Vinitvh

README.md

@@ -75,7 +75,9 @@ You can [download](https://github.com/IIvexII/LGU-TimetableAPI/releases) the lat
 |  GET   | `/sections`  |       `semester`,`degree`       |    all the section in a semester with via degree program.    | [demo](https://lgu-timetable-api.deta.dev/sections?semester=1&degree=BSCS)            |
 |  GET   | `/timetable` | `semester`, `degree`, `section` |       all the degree programs in a specific semester.        | [demo](https://lgu-timetable-api.deta.dev/timetable?semester=3&degree=BSCS&section=A) |
 |  GET   | `/metadata`  |               \_                | all the metadata about `sections`, `semesters` and `degrees` | [demo](https://lgu-timetable-api.deta.dev/metadata) |                                 |
-
+|  GET   | `/days`      |               \_                | return all days of week with their id used in official timetable| [demo](https://lgu-timetable-api.deta.dev/days)  |                                 |
+|  GET   | `/rooms`     |               \_                | return all rooms available in the university                 | [demo](https://lgu-timetable-api.deta.dev/rooms)    |                                 |
+|  GET   | `/freeRooms` | `day`, `time` `(both optional)` |       give the rooms that doesn't not have lecture in it     | [demo](https://lgu-timetable-api.deta.dev/freeRooms?day=Monday&time=12:40) |
 ## Technologies
 
 Technologies used in this project: