PR for company registration form for admin user

[Naman-56-56]

• Added company addition form for admin at the 'http://127.0.0.1:5173/admin/companies/add' endpoint
• Used RHF wrappers for consistency
• Implemented the form similarly to the form at 'http://127.0.0.1:5173/register/company' endpoint for consistency
• Added necessary url endpoints to router

[ankitamk14]

• Wrap fields in a <form> and submit properly
  (handleSubmit on a button onClick skips native form submit)
• add noValidate -- as we are validating via zod -- may give inconsistency

Suggested change

	<Paper sx={{ p: 3 }}>
	<Paper sx={{ p: 3 }} component="form" noValidate onSubmit={methods.handleSubmit(onSubmit)}>

[ankitamk14]

Suggested change

	<Button
	variant="contained"
	onClick={methods.handleSubmit(onSubmit)}
	disabled={addCompany.isPending}
	>
	{addCompany.isPending ? 'Adding...' : 'Add Company'}
	</Button>
	<Button type="submit" variant="contained" disabled={loadingMeta || addCompany.isPending || methods.formState.isSubmitting}>

[ankitamk14]

Improve Zod messages and empty-string handling for URL

Suggested change

	export const adminCompanySchema = z.object({
	name: z.string().min(2, 'Required'),
	website: z.url('Invalid URL').optional().or(z.literal('')),
	domain: z.string().min(1, 'Required'),
	state: z.string().min(1, 'Required'),
	city: z.string().min(2, 'Required'),
	address: z.string().min(5, 'Required'),
	})
	const emptyToUndefined = <T extends z.ZodTypeAny>(schema: T) =>
	z.preprocess((v) => (v === '' ? undefined : v), schema)
	export const adminCompanySchema = z.object({
	name: z.string().min(5, 'Must be at least 5 characters'),
	website: emptyToUndefined(z.string().url('Invalid URL')).optional(),
	domain: z.string().min(1, 'Required'),
	state: z.string().min(1, 'Required'),
	city: z.string().min(2, 'Must be at least 2 characters'),
	address: z.string().min(5, 'Must be at least 5 characters'),
	})

[ankitamk14]

ux polish : Add a Skeleton instead of plain “Loading options…”.
https://mui.com/material-ui/react-skeleton/

[ankitamk14]

ux polish :
Autofocus first field

Suggested change

	<RHFTextField name="name" label="Company Name" fullWidth />
	<RHFTextField name="name" label="Company Name" fullWidth autoFocus />